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Netlab Reference Manual gbayes
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<H1> gbayes
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<h2>
Purpose
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Evaluate gradient of Bayesian error function for network.

<p><h2>
Synopsis
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<PRE>
g = gbayes(net, gdata)
[g, gdata, gprior] = gbayes(net, gdata)
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<p><h2>
Description
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<CODE>g = gbayes(net, gdata)</CODE> takes a network data structure <CODE>net</CODE> together 
the data contribution to the error gradient
for a set of inputs and targets.
It returns the regularised error gradient using any zero mean Gaussian priors
on the weights defined in
<CODE>net</CODE>.  In addition, if a <CODE>mask</CODE> is defined in <CODE>net</CODE>, then
the entries in <CODE>g</CODE> that correspond to weights with a 0 in the
mask are removed.

<p><CODE>[g, gdata, gprior] = gbayes(net, gdata)</CODE> additionally returns the
data and prior components of the error.

<p><h2>
See Also
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<CODE><a href="errbayes.htm">errbayes</a></CODE>, <CODE><a href="glmgrad.htm">glmgrad</a></CODE>, <CODE><a href="mlpgrad.htm">mlpgrad</a></CODE>, <CODE><a href="rbfgrad.htm">rbfgrad</a></CODE><hr>
<b>Pages:</b>
<a href="index.htm">Index</a>
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<p>Copyright (c) Ian T Nabney (1996-9)


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